Cradle invert subsoil drainage pipe



Sept. 2, 1952 D. B. DIMICK 2,508,828

CRADLE INVERT SUBSOL DRAINAGE PIPE Filed Feb. 4, 1949 ATTORNEYS Patented Sept. 2, 1952 2,608,828 v; j Y i CRADLE-mysnip sUBsoiL DRAINAGE'VHPE; Daniel B. Dimick, YWellesley, Mass., assignortovi Y' I Dimick-Mosher Products Company, llyostolpi Mass., a corporation of Massachusetts Application February 4, 17949, Serial No.'74,651{

The present invention in cradle invert sub-soil drainage pipe and constitutes certain improvements over lthe. .subdrainage pipe disclosed` in my. prior Patent 2,089;115granted August 3,A 1937, andre-issue May 24, Y1938,`l:'teissue 20,736. Y

It is an object of the present invention-Lto providev a subedrainage pipe which is without bell and spigot for augur` machine production;

The elimination ofthe bell and spigot gives rise to certain problems in accurately aligning the sections of the pipe and in controlling the port area of the openings between adjacent 'pipe Vsections `and it is a further object of the invention to provide alignment and orienting means be.

tweeny the pipe sections for correctlyrelating one pipe section to another so that the internal passage of the entire pipe line will accurately register as to all ofthe member sections thereof topinsure the most eiicient carry-off continuity.

A still further object of the inventionis to provide means for coupling the sections together on the alignment and spacingdevices whereby theelement of human 'error,will be .eliminated in the laying of the pipe section in-the ltrench and of locating the pipe sections relatively to one another in the line of the drainage'pipe.

Withjthe foregoing and other objects in view, theinvention will be more-fully described hereinafter, and will be morel particularly pointed out in the claims appended hereto.

Inv-the drawings, wherein Ythe symbols refer to like or corresponding parts throughoutv the several views,

Figure 1 is a fragmentary perspective View. of a section` of theimproved drainage pipe with the coupling means andialignment devices exploded,

Figure 2 isan end View showing two units of the improved drainage pipe as the same emerge iromwthe augur machine, f

v Figure 3 is a fragmentary top plan view of two adjacent sections of the pipe showing the dowels and spring-.couplers vin position,

.I Figure 4 is a fragmentary vertical section taken` on the line 4-;,4oi:,Figure 3,

Figure 5 is a longitudinalvsectional view taken on the line 5 5 in Figure 3, and

Figure 6 is a perspective view of a form of spring coupler employed.

Referring more particularly to the drawings I0 and Ilia designate adjacent sectionslof the -improved pipe whichmay be manufactured of metal, clay or other appropriate material. Each sectionphas a body wall II of generallysemicylindrical form and a cradle' or top wall VI2 which'mayor may not'slope from endto end of the vpipe section and which cradle or top wall isvprefe'rably made integral-With Vthe bodyiwall I I and is connected with the body' wall near but somewhat below the upper edges I3 thereof.) The cradle or top wall I2 may or maynot be ,transver'sely curved. Feet or projections I5 are preferably` castor otherwise formed or provided on w elates to improvements Y y 9 Claims. (o1. G11- 11)- the lower externalcentral portion ofthe body wall I I to embed themselves inl' the bottom. of the trench'or ground toV properly maintain the pipe sections in erect position' with the cradle wall I2 uppermost and substantially horizontal.

Dowel pins I6v having intermediate spacers or collars I'I are adapted to fit into sockets I8 provided in the shoulderslIII-'of adjacent pipe sections IIl and Illa. -W Y At the ends of the pipe sections and in inter.- mediate portions of the top walls I2 are holes I9 adapted to receive the spring coupler which Ais shownv more particularly in Figure`6v to comprise a shank 20 having down-turned legsr2I with a spring helix or convolution 22'centrally ofthe shank 2Q and out-turned terminalsA 23`on the lower ends ofthe legis 2I.-- y v In the use of the devicejitywill' be seen-that unlike the sub-drainage pipe inmy prior patent, the present -pipe is completely devoid of the bell and spigot ends and accurate alignment of the pipe sections I0 and Illal is obtained by the fitting of opposite ends 'ofthe dowelpinsv I6 into the sockets I8 of opposing pipe sections Il] and -Ia as shown more particularlyin Figure 4.7 The spacers of the collars `I-1f" are :of larger diameter than the pins IS-sothat the shoulders I4 ,ofi the adjacent pipesections- Ill'and' Ill1 abut against opposite facesv of the spacers Il. Accordingly the width of the spacer II` determines the drainage opening 24- between the Vadjacentfpipe sections Ill and'IIl.v l' 'Y y By way of example, thesedowels I6 may be a quarter inch 7in diameter and three inches long with the spacer I1 in the' center oneeighth 'to one-quarter inch thick according to the port area of drainage opening 24desired.

In accordance with this construction it is not" necessary that the top wall I2 shall incline from one end of the pipe section to another but this top wall I2 may bein astraight'line. The flow will be induced by laying the'pipe line .onf an in.- clination so as to:induce.. the flow-of 'water down along the cradle tops I2 tothe drainage openings 24 through which the sub-drainage water in'ds its way downwardly into the interior of Ithe pipe section which is the carry-orf section. The .control of the width of the drainage openingxd. be-r tween pipesections I0 and II)a is very important` to prevent extraneous matter such as fines, from finding its way into the interior or carry-ori section as such rines or extraneous matterrtend to clog the carry-off section and impede the evacuation ofthe sub-drainage water by the pipe; u

The steel clip yor spring coupler is usedto initially hold the two pipe sections-together on the dowel pins IB and against. the spacers 'I-l. The clip is preferably placed inthe middle of the cradle I2 through the two holes I9 provided in the opposed pipe sections. The distance between the legs 2l in the .unsprung condition oftheclip or coupling is somewhat shorter. than the distance between the holes I9 of adjacent pipe sections I and 10B when' these pipe sections are abutted tightly against the opposite faces of the spacer l1, so that it becomes necessary to contract the helix 22 and pull out opposite shank portions to stretch the legs 2l so that they may be inserted downwardly into the holes i9. The inherent resiliency in the spring clip acting through the helix 22 will thus tend to drawrthe legs 2l together and in so doing will set up the pipe sections I0 and I0a iirmly against the spacers l1. This is to insure that the selected port area of the drainage opening 24 will be arrived at irrespective of unskilled labor or inattention on the part of the laborerslaying the pipe. The outturned terminals 23fwi1l tend to engage the bottom. walls of the holes I9 to prevent theclip from being accidentally dislodged. The clips may be made of spring steel whichwill be consumed by rust after installation. However this is unimportant as the pipe sections will then be held in proper alignment and relationship by the backiill placed over and around the same.

The dowels may be made of hard rubber, steel, die cast metal or the like.

The manufacture of the pipe without the bell permits the same to be produced by the augur method horizontally rather than bythe exuded die method vertically. The augur method of manufacture is faster and cheaper than the old method of exuding from the die vertically. One of the main disadvantages of bell construction on pipe of this design is breakage of the bell sections in shipment and handling. Furthermore a decided economy isr obtained in burning bell-less vitriiied pipe in the kiln as it permits closer stacking and safer stacking in the kiln. Another advantage of this design lies in the fact that it maintains a denite predetermined drainage opening 24 betweenkjoints as it eliminates the human Velement of error in laying the pipe. Where semi-bells arerused the workmen fail to push the pipe in a snug manner close together but theyljust throw the pipeV sections in loose and as one length or pipe section is fit opposite another the same may back away from each other and thus an opening 24 that is predetermined to be of a width of a quarter inch enlarges to say three-quarters of an inch which becomes a very serious departure as such wider opening allows stones or foreign material to get into the run-off section, thus clogging the pipe.

While I have disclosed herein the best form of the invention known to me at the present time, I desire it to be understood that I'reserve the right to make changes and modications in the herein described embodiment of the invention provided such changes fall within the scope of the following claims. I

What I claim is:

1. In sub-drainage pipe, adjacent pipe sections each having an imperforate cradle top wall along which seepage water is adapted to ilow, spacing means between the ends of the pipe sections to space the ends of the sections apart to provide drainage openings down through which the water from the imperforate cradle tcp walls finds its way into the run-ofi` sections, and means for urging the pipe sections toward one another upon said spacing means.

2. Sub-drainage pipe as claimed in claim 1 characterized by the fact that said spacing means comprises dowel pins fitting in opposed sockets at opposite ends of the pipe sections and having collars outstanding from the intermediate portions thereof of greater diameter than said sockets and of substantial axial widthV to receive on opposite sides thereof the'ends of the opposed pipe sections, with a substantial space maintained between the pipe sections by said collars to afford predetermined drainage spaces between the pipe sections.

3. A sub-drainage pipe as claimed in claim 1 in which said last named means comprises a resilient device for yieldably drawing the two pipe sections towards one another on said spacing means.

4. A sub-drainage pipel as claimed in claim 1 in which said last named means is a spring clip comprising a spring helix,v shank sections extending in opposite directions from said helixand feet extended off said shank sections and inserted through holes in the adjacent pipe sections.

5. A sub-drainage pipe, as claimed in claim 4. characterized by the fact that said feet have out-turned ends.

6. In a sub-drainagepipe adjacent pipe sections each having an imperforate cradle substantial top fiat wall along which the drainage Water is adapted to ilow by'gravity, said sections having aligned sockets spaced apart at substantially opposite ends of said flat cradle wall, dowel pins fitted in opposing sockets of said sections and having spacing collars outstanding from intermediate portions vthereof forV determining the degree of spacing of the end walls. of the sections, and means for drawing the sections toward one another on said dowel pins with the ends of the sections abutting. opposite'faces oi said collars to insure the predetermined spacing of the sections.

7. Sub-drainage pipe as claimed in claim 6 in which holes are made through said cradle walls adjacent ends of the sections, and further comprising a spring clip having feet relatively movable with a spring device connecting said feet and normally holding the feet spaced apart a distance less than the distance between the holes of adjacent pipe sectionsv when the ends of such pipe sections are closely abutted against opposite sides of said collars, said feet sprung apart and inserted into said holes to draw the pipe sections resiliently together.

8. A sub-drainage pipe as claimed in claim 7 in which the feet have-out-turned terminals to engage the inner walls of said pipe sections.

9. In sub-drainage pipe, adjacent pipe sections each having a cradle top wall along which seepage water is adapted to flow, spacing means to axially space the ends of thesections apart to provide drainage openings down through which the water from the cradle top walls finds its way into the run-oit sections, and means for urging the pipe sections in an axial direction toward one another upon said spacing means.

DANIEL BDIMICK.

REFERENCES vcrmn The following references are of record in the nie of this patent:

UmTEDsTA'rEs PATENTS Number Name Date 660,308 Pixley Oct. 23, 1900 901,582 Austin Oct. 20, 1908 944,022 Eken Dec. 21, 1909 1,807,898 Davidson June 2, 1931 2,029,920 Gutman Feb. 4, 1936 2,116,165 Ullman May 3, 1938 2,135,103 Dimick Nov. 1, 1938 2,282,559 Byers v -v g.- May 12, 1942 2,317,907 Gent f- Apr. 27, 1943 

